Yes, SDM test in Skytest software is buggy.
Apart from that "pause window" which 90% times it doesn't let you to continue playing in Skytest, a few of us have found:
* Average time for removing strips >> It's wrong. This will make ur final percentage decrease a lot. So, forget about final percentage.
* You usually get more strips than space available in ur table. BUT you can move CHECKPOINTS STRIPS for allocating more flight strips (but it won't enough anyways).
* Revisions tell you to change info from flight strips that haven't still appeared.
Good news:
Real FEAST exam is with 8 checkpoints and only 2-3 strips for each one (Skytest sends you 300 strips
) So you'll spot easily local conflicts. Few users have passed FEAST-2 without focusing on opposite conflicts at all. Local conflicts varied from 5 to 10.
First time you make a mistake (bad removal, bad insert, wrong conflict, etc) FEAST exam stops and tells you your mistake. After that, it doesn't tell you anymore.
Bad news:
Revisions in real FEAST exam are harder than in Skytest. In Skytest it tells you all data from flight strip before revision. In real exam they only tell you flight number and then, new info you need to change.
In a few words... practice SDM but don't trust game behaviour. And at final statitics check only "how many strips you inserted/removed correctly" (don't look percentages).
EDIT: I've just been told about Feast Test Prep Tool ( feasttest.com ). SDM, English test and Sorting Figures/numbers are quite more similar to real exam.