Hi,
I try to receive lightning network payment. These were what I did:
1. I opened a channel.
2. I reverse swaped it using submarine swab by clicking max button. It says it should increase the receiving capacity. The electrum history says reverse swap 0.53 mbtc.
3. I failed to receive multiple amount. The capacity was around 6.5 mbtc (according to channel detail it could receive that amount), but failed to received 4 mbtc.
4. Try to increase receiving capacity by doing  submarine swab again. But on the electrum history tab it says forward swab 6.4 mbtc and channel detail said it can receive 0.179 mbct.
5. I thought I increased tx capacity by accident, so I try to swap it again but got "payment failed no path found" error.

Questions:
1. Why did I fail to receive 4 mbtc even though the channel said can receive 6 mbtc?
2. How to troubleshoot when failed to receive? How can check network nodes from the tx side to rx side?
2. How to fix "no path found error"?

regards