Self programming the msp430fr

I have been working getting the msp430 to do software updates.. using msp430fr5959

I cut my fram in half so that i have a place to store the code.

FRAM : origin = 0x4400, length = 0x4000
FRAMX : origin = 0x8400, length = 0x7A00
FRAMBL : origin = 0xFE00, length = 0x0180
FRAM2 : origin = 0x10000,length = 0x4000

FRAMX is where i store the code
FRAMBL is where store my function.

I can successful deliver a software pack to the device. 

my main loop looks like this

while (!deploy_flag) {
// normal code
}

if (deploy_flag) {
deploy();
}

I trigger the reprogram with deploy_flag. It breaks out the program loop and runs deploy.

#pragma CODE_SECTION(deploy, ".BL")

void deploy() {
	__disable_interrupt(); // disable interrupts
	unsigned int line;
	unsigned int i;
	for (line = 0; line < 900; line++) {
		if (code[line][0] == code_Address) { //address
			address = (((unsigned long) code[line][1]) << 16) + (((unsigned long) code[line][2] << 8)) + code[line][3];
			add = (unsigned int*) address;
		} else if (code[line][0] == code_FullLine) {
			size = 16;
			for (i = 0; i < 16; i++) {
				codeblock[i] = code[line][i + 1];
			}
			writeblock();
		} else if (code[line][0] == code_ShortLine) {
			size = code[line][1];
			for (i = 0; i < size; i++) {
				codeblock[i] = code[line][i + 2];
			}
			writeblock();
		} else if (code[line][0] == code_EOF) {
			WDTCTL = 0;
			break;
		}
	}
}
#pragma CODE_SECTION(writeblock, ".BL")
void writeblock() {
	unsigned int i;
	for (i = 0; i < size; i += 2) {
		*add++ = (codeblock[1 * i + 1] << 8) + codeblock[1 * i];
	}
}

As you can see the first thing i do is kill the interrupts.. then i read my code that is in a format i created to build a block of code to write.. 
Also memory protection is off

I guarantee that i never write in the FRAMX and FRAMBL areas..

It seems to work fine.. i successful deployed an update. 

after im finish writing i call WDTCTL = 0; to reset the device

But i noticed before i call the reset that interrupts came on. I was not expecting this.

My question is am i doing something dangerous here? unsafe?
Is there areas of code that i should not be writing?

I do have checks that verifies the integrity of the package. so we can assume im writing what im expecting to write.

Anything i should be looking out for?