Is he/are you running full sequential or batch?
I have had not experience running full sequential.
You will only increase a row at a time. you will rough in the spark map while you are tuning fuel. Once you are happy with fuel to the rpm you are tuning, for example 0-4000, Start tuning the spark. As you have for fuel, make sure ALL spark table corrections are turned off when tuning. ambient, engine and intake air temp will make changes on how much timing you can run so take note of the temperatures while your tuning as they will help you extrapolate temperature based spark corrections later on.
Note: This is all at Wide open throttle/full noise
Going back to the tuning bit, your most critical area for spark is wide open throttle. On an NA motor (yourse) this will be at MAP (manifold air pressure) values of 90 to 100 centibar (= 100kpa = 1 bar. The values in the left column of bin values.) Lets say your top 3 bins are 90 - 95 - 100.
I would start with the 90 row been 1 degree LESS then the 95 row. and the 100 row been 2 degree less then that. Every engine is different and the zones of efficiency given by the cam will dictate the pattern that will emerge in the table. You say at 2000rpm you might be up to about 20 degrees. So you bins will be:
90kpa @ 2000rpm = 23
95kpa @ 2000rpm = 22
100kpa @ 2000rpm = 20
You will loose this pattern as you get the tune in. But to stat with. You will do a pull. From 500rpm, in top gear or 4th. plant your foot to the floor and listen carefully for engine knock. IF YOU DO NOT HEAR A KNOCK continue to Pull all the way to 4000rpm.
(If you hear a knock, diagnose exactly were on the table it occurred. decrease this value, and all the following locations by 3º. You should not be hearing knock this early or you are starting with your spark map to aggressive. This is the only time you will reduce all following locations. pull your whole map back and start afresh.)
When you do a pull you need to load the engine as much as you can, Finding a STEEP hill is important. Especially in the high RPM range, so you can use lower gears to get the high rpm without exceeding the speed limit.
Back off and use the cursor to grab and highlight the top 3 rows (90 - 95 - 100) from 500rpm to 4000 and use the sum field, top right of the window. put in 2. and hit the "+" and every highlighted field will increase by 2. (this is megatune, tuner studio might be different)
Do another pull.
Do this a few times and you will eventually hear engine knock. Diagnose that one location on the table and reduce it by 3. Note that location and do not change it again. Do another pull. reduce any locations that knock and do not touch them again. once you have completed a pull without knock, all the bins that DID NOT knock and need reducing, you can increase by 2. The bins that you have already had to reduce, do not touch them.
Once you have done this to the majority of the map you will start to see a pattern. It might rise quickly to 25 degrees by 2400rpm, then drop back to 21 degrees till 3000rpm then rise again till 33 degrees.
Make sure you frequently save changes.
Realise that the computer extrapolates the advance to 0.1 of a degree, based on a linear point between 4 map locations. So moving a single value, will effect readings given by all 8 locations around it.
it is for this reason that you may be able to get more spark, you can choose to do this step. make a backup of your current table. Increase all the bins from 1000-4000 by 2 degrees. And do a pull. repeat the process as above. reduce those values that cause knock by 3.
If you get knock right though, constantly then reload the table you just saved, burn and leave it at that. get the value of the top 3 locations at 4000rpm, and carry them to the right. Your WOT is now set until you get on a dyno.
You can increase advancement for locations below 90kpa by 2's or 3's and you should be running 30-40 degrees by 50kpa above 2500rpm. continue the pattern of the WOT locations across.
From 50kpa, carry each rows 50kpa value down. so all locations below 50kpa will have the same value as the location above it. extending to the bottom of the table.
As you get more experience you will start molding the table more. but this will give you good power and cruise areas fairly quickly.
Once this and fuel is done you can worry about fixing the modifiers.
The one you will probably notice the most is acceleration enrichment. I always have it disabled when tuning unless the hesitation is too bad to ignore.