I am not even sure I can explain this problem very clearly. I am doing some relatively complex lemma searches. For example I was searching for all forms of χάρις in Ephesians. Here is my search string:
lemma:χάρις OR lemma:ἀχάριστος OR lemma:εὐχαριστέω OR lemma:εὐχαριστία OR lemma:εὐχάριστος OR lemma:συγχαίρω OR lemma:χαίρω OR lemma:χαρά OR lemma:χαρίζομαι OR lemma:χάριν OR lemma:χάρισμα OR lemma:χαριτόω
When the search is finished it shows 20 results in 18 verses (see inset) - Note that my window is not showing the entire list - this seems to be important.
If I print out this list from this window as it is it only includes 18 of the occurrences even the top still says 20 results in 18 verses.
Here is the rub - if I scroll this window to the bottom of the list and THEN print - it prints them all. If I float the panel and THEN print it prints them all. If I scroll the window back to the top of the list - it drops occurrences off.
Here is the print out to show what I mean - note that is only lists 18 even though the header says 20 - .jpg)
If I scroll the window or float it before I print this is what I get - 
I have been able to duplicate this problem with other searches as well. Can anyone else verify this behavior?