What went wrong? Please help! Sleepyhead data included.

[Chairman Meow]

When I first started CPAP about two years ago it was the answer to my prayers. Back then I was a frequent visitor here, and monitored my SleepyHead data religiously. I became complacent though, and now I've forgotten everything I learned and I need help to figure out the problem.

About a month ago I started noticing that I was not sleeping as well. Then about two weeks ago, I started noticing that my humidifier tank was much emptier in the mornings than it used to be. Then two nights ago I actually ran out of water before I woke up. OMG, the smell!!!! Anyway, I Googled the problem, and found that leaks can be the culprit of an emptying-too-soon humidifier. Today I came home and looked at my data on Sleepyhead for the first time in more than a year... and I don't know what I'm looking at. I don't even remember what the pie chart on the left is supposed to look like

Help? I included a few nights for comparison sake. I can also post some from when I first started if that will help?

Last night: http://imgur.com/a/A8obm
Wed night: http://imgur.com/a/uBRU8
Tues night: http://imgur.com/a/axCke

Then there is this Overview that seems to indicate that SOMETHING went wrong about a month ago... but I may be misreading this entirely.

http://imgur.com/a/3925y

Thank you so much for any help or guidance you may be able to offer!

[TASmart]

Whatever it was it seems to have resolved. Could be leaks, illness, weather, cats, many things but trying to look back a month and fix a mystery thing is difficult, to say the least.

[LSAT]

I don't see anything...maybe the house was dryer than normal or the humidifier was not filled to max.