Yes, I have heard this and, as I say, it remains a possibility. Whether OP goes upstairs once or twice doesn't affect my overall thinking on what happened. I don't think it matters. He went upstairs at least once. We know that for sure. And he went in the bathroom.
There are inconsistencies between all the witness testimony but there are also commonalities which I don't think should be ignored.
Because of the inconsistencies, my timeline has focused on the period outside 03:00-03:17 where I've been investigating what led up to Reeva's death and what OP does afterwards and whether it shows there may be both a reason for what happened and a need to cover it up. I'm concentrating on objective facts and then tallying them with testimony / affidavits etc. This has proven fruitful because it has convinced me that some of OP's version is untruthful or, as Nel puts it, "it did not happen". But I will also cover the 03:00-03:17 period in my timeline, albeit that there will be times, sequences and events which cannot be stated with absolute certainty. This won't matter so much when the whole picture is considered. I'm categorising evidence as being factual, almost certainly true, reasonably possibly true through to speculative/conjecture. Factual has been my starting point.
But because Masipa's chronology was very much the basis for her dismissing any evidence that doesn't fit it, I'm just doing a little exercise to test her timeline and to show where it can be trusted and where it is conjecture (and why). Of course, I'm mindful that she has access to more (and more accurate) information than me ... but it's interesting to note that so does Nel and Roux and so when a fact is stated for which I have no other evidence if it doesn't tally with the same fact that Roux states, it's worth checking out! I'll put something up on this when it's ready.