Error on Get Data - Power BI Desktop

1.  I split my data by month from January to July. I am trying this method to see a monthly effect on the trend . However I only manage to upload 2 data table out of 5 tables.
2. Odd thing was I was able to upload the table when I combine Jan to June in 1 table.  

 Question : is there some sort of limits in size / number of tables /columns  for uploading queries.