Tier 1 G - ILR - income threshold help

Dear All,

My ilr is due in april 2016, got my Tier 1 G in 2011, extension in 2013, now applying for ILR in 2016. There is variation in my earnings, it's not consistent. Can you please help me out is it ok or can be a problem for me.

Year 1 - Tier 1 G First Application (2010-2011) - Total Earnings - 38k - self - employed All Taxes paid)
Year 2 - 2011 - 2012 (Total earnings was 8.5k - self employed - Taxes paid)
Year 3 - Tier 1 G Extension applied (2012- 2013 - Total Earnings - 37.5k employed - All Taxes Paid)
Year 4 - 2014- 2014, employed - 30k all paid
Year 5 - 2014- 2015 , employed - 28.5 k, all paid
Year 6 - 2015-2016, employment - total earnings 37k, all paid)

As you can see in 2011-2012, my income was low around 8.5k. Do you think that can be a problem for me ?

Secondly there is fluctuations in my income, it is not consistent, i mean 35k in all the 5 years, can this create a problem in my ILR.

Thirdly, i was only twice out of country for only 3 wks each time, does this make me to attain a letter from my employers?

Thanks alot, if your share your expertise .